[calls] meson: Add postinstall script to compile schemas etc

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 49c347ca316a6af5c8e042d91421d2f2b6341951
Author: Evangelos Ribeiro Tzaras <evangelos tzaras puri sm>
Date:   Wed Jun 30 00:39:07 2021 +0200

    meson: Add postinstall script to compile schemas etc
    
    Closes #298

 build-aux/meson/postinstall.py | 18 ++++++++++++++++++
 meson.build                    |  1 +
 2 files changed, 19 insertions(+)
---
diff --git a/build-aux/meson/postinstall.py b/build-aux/meson/postinstall.py
new file mode 100644
index 00000000..bd76f1a3
--- /dev/null
+++ b/build-aux/meson/postinstall.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+
+from os import environ, path
+from subprocess import call
+
+# Package managers set this, so we don't need to run
+if not environ.get('DESTDIR', ''):
+    prefix = environ.get('MESON_INSTALL_PREFIX', '/usr/local')
+    datadir = path.join(prefix, 'share')
+
+    print('Updating icon cache...')
+    call(['gtk-update-icon-cache', '-qtf', path.join(datadir, 'icons', 'hicolor')])
+
+    print('Updating desktop database...')
+    call(['update-desktop-database', path.join(datadir, 'applications')])
+
+    print('Compiling schemas...')
+    call(['glib-compile-schemas', path.join(datadir, 'glib-2.0', 'schemas')])
diff --git a/meson.build b/meson.build
index 657df0d1..67dcecff 100644
--- a/meson.build
+++ b/meson.build
@@ -125,3 +125,4 @@ subdir('doc')
 subdir('data')
 subdir('tests')
 
+meson.add_install_script('build-aux/meson/postinstall.py')
\ No newline at end of file